This larger version of the Standard Schnauzer has long been shown to be one of the best watchdogs any owner can have in the house. Loyal yet playful the breed does can easily learn to distinguish between intruders who are greeted warily and members of the family who treated with great kindness and love. Giant Schnauzers have also demonstrated their intelligence on many standard measures of doggy intelligence including activities such as tracking and obedience tests where they are known to do well.